package cn.edu.hbpu.filter;

import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author lcy
 * @date 2022/8/6 14:42
 * @description
 */
@Component
public class ExceptionFilter extends OncePerRequestFilter {
    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        try {
            filterChain.doFilter(request, response);
        } catch(Exception e) {
            request.setAttribute("filterException", e);
            request.getRequestDispatcher("/handleFilterException").forward(request, response);
        }
    }
}
